Drill-hoe point



(N0 Model.) Y

A.Y R. LUDLOW.

DRILL Hon Polm'.'A

Nq. 273,315. Patented Mar. 6, 1883.

Affili/ff l Y 7n venian N. PETERS. Phammhngnphu. wmhingmn. D4 c.

UNITED STATES PATENT OFFICE.

ABRAHAM R. LUDLOW, OF SPRINGFIELD, OHIO.

DRILL-HOE POINT.

SPECIFICATION forming part of Letters Patent No. 273,375, dated March 6,1883.

- Application filed June 14, 1882. (No model.)

To all whom it may concern:

Be it known that I, ABRAHAM R. LUDLow, a citizen of the United States,residing at Springfield, in the county of Clarke and State ot' Ohio,have invented certain new and useful Improvements in Drill-Hoe Points;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to\make and use the same, reference being hadto the accompanying drawings, and to the letters and figures ofreference marked thereon,which form a part of this specitication.

My invention relates to new and useful improvements in drill-hoepoi-nts, and in the manufacture of the same.-

In drill-hoes as at vpresent made the blanks are made of steel, andstruck upin aformingblock, after which a hole is punched or drilled init for the rivet with which it is attached to the tube. This inode ot'manufacture requires not only alarge outlay for the material, which isexpensive, but it also requires asuccession of steps in cutting out theblank, forming it, punching or drilling the hole, countersinking it forthe rivet, dsc., all of which require much time and labor.

My invention consists ot' a malleable-iron drill-hoe point having itsbody case-hardened and the rivet cast integral with the body, for thepurposehereinafter t0 be set forth.

Figure l is a perspective view of my improved drill-hoe point. It isshown attached to the lower end df the tube of the grain-boot.

Fig. 2 is a vertical section of the same through the centrallongitudinal line of the hoe and tube. Fig. 3 is a vertical section ofthe hoepoint cast in one piece with its own rivet, the lower end beingbroken o". Fig. et is a top view of a drill-hoe point entire of the samekind as that seen in Fig. 3.

a is the hoe-point, (shown'in Figs. 1 and 2,) attached by rivet c to thetube b. In these figures it is shown as thelinished product, ground andcase-hardened or tempered.

In Fig. v3 the hoe-point a is shown detached from the tube, and showsmore particularly the rivet-shank d cast upon it. In the process ofannealing and case-hardening or tempering this is left in its soft orannealed condition to allowitto beeasilyriveteddown upon theinside ofthe tube b when attached thereto. This construction of the drill-hoepoint, having the rivet made integral with the same, possesses the stillfurther advantage of having the front 0r wearing surface unbr0ken,andthe liability to wearing oft' ofthe rivet-head and loosening of thepoint obviated.

The 'drill-hoe point seen in Fig. 4 is in its unfinished state as it istaken from the molds, being neither case-hardened nor ground.

I ann aware that malleableiron shovels, spoons, Svc., have been madewith lugs and projections formed of the same material, but am not awarethat malleable-iron drill-points have ever been case-hardened andprovided with an annealed or soft rivet for attaching it to the tube.Therefore,

What I claim is- A malleable-iron drill-point havin g its'bod yvcase-hardened and the rivet ot' soft or annealed -iron cast integralwith the body,

for the purpose set forth.

In testimony whereof I affix my signature in presence ot' two witnesses.

ABRAHAM R. LUDLOW. Witnesses:

G. M. GRIDLEY, B. C. CoN'vERsE.

